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Sex·a·ges·i·mal a. Pertaining to, or founded on, the number sixty.

**Sexagesimal fractions** *or* **Sexagesimal numbers** Arith. & Alg., those fractions whose denominators are some power of sixty; as,

**Sexagesimal arithmetic**, *or* **Sexagenary arithmetic**, the method of computing by the sexagenary scale, or by sixties.

**Sexagesimal scale** Math., the sexagenary scale.

As·tro·nom·ic·al a. Of or pertaining to astronomy; in accordance with the methods or principles of astronomy. -- As*tro*nom*ic*al*ly, adv.

**Astronomical clock**. See under Clock.

**Astronomical day**. See under Day.

**Astronomical fractions**, **Astronomical numbers**. See under Sexagesimal.

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